Patents by Inventor Isamu Takeshita

Isamu Takeshita has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Fabric for ink jet recording
    Patent number: 6025063
    Abstract: A fabric for ink jet recording, which has a boehmite porous layer on the fiber surface of the fabric and is softening-treated.
    Type: Grant
    Filed: May 21, 1996
    Date of Patent: February 15, 2000
    Assignee: Asahi Glass Company Ltd.
    Inventors: Takuya Nakao, Isamu Takeshita
  • Recording medium and method for its production
    Patent number: 5912071
    Abstract: A recording medium comprising a substrate and a porous layer formed on the substrate, said porous layer comprising alumina hydrate particles and nonionic or cationic water-insoluble resin particles having an average particle size of from 0.005 to 0.1 .mu.m.
    Type: Grant
    Filed: April 23, 1997
    Date of Patent: June 15, 1999
    Assignee: Asahi Glass Company Ltd.
    Inventors: Isamu Takeshita, Takuya Nakao, Nobuyuki Yokota
  • Ink jet recording medium and record
    Patent number: 5683784
    Abstract: An ink jet recording medium comprising a substrate made of a fiber material coated with porous particles having a particle size of from 0.1 to 30 .mu.m, and a surface layer made of boehmite as the main component, formed on the substrate.
    Type: Grant
    Filed: September 27, 1995
    Date of Patent: November 4, 1997
    Assignee: Asahi Glass Company Ltd.
    Inventors: Takuya Nakao, Isamu Takeshita
  • Method for restoring the current efficiency
    Patent number: 4729819
    Abstract: In the electrolysis of sodium chloride by means of a perfluoro cation exchange membrane for the production of sodium hydroxide having a concentration of from 32 to 40% by weight, a method for restoring the current efficiency, which comprises suspending the electrolysis when the current efficiency of the perfluoro cation exchange membrane has dropped to a predetermined level, and maintaining the catholyte concentration at a level of not higher than 30% by weight.
    Type: Grant
    Filed: January 2, 1986
    Date of Patent: March 8, 1988
    Assignee: Asahi Glass Company Ltd.
    Inventors: Manabu Suhara, Kohji Suzuki, Isamu Takeshita
  • Method of bonding cation exchange membrane of fluorinated polymer
    Patent number: 4318785
    Abstract: A method of bonding a cation exchange membrane which comprises melt-bonding a part of the cation exchange membrane of a fluorinated copolymer in the form having ion-exchange groups of --COOY wherein Y represents hydrogen atom or a C.sub.1 -C.sub.20 alkyl group, when the cation exchange membrane is used in the form having ion-exchange groups of--(COO).sub.m Xwherein X represents an alkali metal, an alkaline earth metal or --NHR.sub.1 R.sub.2 R.sub.3 and R.sub.1 to R.sub.3 respectively represent hydrogen atom or a lower alkyl group and m is a valence of X.
    Type: Grant
    Filed: August 9, 1979
    Date of Patent: March 9, 1982
    Assignee: Ashai Glass Company, Limited
    Inventors: Tomoki Gunjima, Isamu Takeshita
  • Method of bonding cation exchange membrane of fluorinated polymer
    Patent number: 4225400
    Abstract: A method of bonding a cation exchange membrane which comprises melt-bonding a part of the cation exchange membrane of a fluorinated copolymer in the form having ion-exchange groups of --COOY wherein Y represents hydrogen atom or a C.sub.1 -C.sub.20 alkyl group, when the cation exchange membrane is used in the form having ion-exchange groups of--(COO).sub.m Xwherein X represents an alkali metal, an alkaline earth metal or --NHR.sub.1 R.sub.2 R.sub.3 and R.sub.1 to R.sub.3 respectively represent hydrogen atom or a lower alkyl group and m is a valence of X.
    Type: Grant
    Filed: February 28, 1979
    Date of Patent: September 30, 1980
    Assignee: Asahi Glass Company, Limited
    Inventors: Tomoki Gunjima, Isamu Takeshita
  • Method of bonding cation exchange membrane of fluorinated polymer
    Patent number: 4206022
    Abstract: A method of bonding a cation exchange membrane which comprises melt-bonding a part of the cation exchange membrane of a fluorinated copolymer in the form having ion-exchange groups of --COOY wherein Y represents hydrogen atom or a C.sub.1 -C.sub.20 alkyl group, when the cation exchange membrane is used in the form having ion-exchange groups of--(COO).sub.m Xwherein X represents an alkali metal, an alkaline earth metal or --NHR.sub.1 R.sub.2 R.sub.3 and R.sub.1 to R.sub.3 respectively represent hydrogen atom or a lower alkyl group and m is a valence of X.
    Type: Grant
    Filed: May 18, 1978
    Date of Patent: June 3, 1980
    Assignee: Asahi Glass Company Ltd.
    Inventors: Tomoki Gunjima, Isamu Takeshita